Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Poster Session: Correlated Electrons 2

TT 20.20: Poster

Montag, 20. März 2017, 15:00–19:00, P2-OG1

Competing spin textures in j=1/2 Mott insulators on the triangular lattice — •Tilman Disselkamp and Simon Trebst — University of Cologne

Similar to their well-studied electronic counterparts, quantum magnets exhibit a wealth of novel phenomena in the presence of strong spin-orbit coupling. Of particular interest are Kitaev materials, spin-orbit entangled j=1/2 Mott insulators where topology plays a key role in the formation of magnetic order – either in the emergence of spin liquid physics or, of interest here, the formation of non-trivial spin textures. Specifically, we consider j=1/2 Mott insulators in triangular lattice geometries, relevant e.g. to the sister compounds Ba₃IrTi₂O₉ and Ba₃TiIr₂O₉ for which we study the interplay of geometric frustration and spin-orbit coupling. The latter gives rise to Kitaev or Dzialoshinskii-Moriya interactions that stabilize a Z₂ vortex crystal or a skyrmion crystal, respectively. Using classical Monte Carlo simulations, we map out the stability and interplay of these spin textures in a magnetic field at zero and finite temperatures.